CN100403647C - Small linear ultrasonic motor - Google Patents
Small linear ultrasonic motor Download PDFInfo
- Publication number
- CN100403647C CN100403647C CNB2005100376449A CN200510037644A CN100403647C CN 100403647 C CN100403647 C CN 100403647C CN B2005100376449 A CNB2005100376449 A CN B2005100376449A CN 200510037644 A CN200510037644 A CN 200510037644A CN 100403647 C CN100403647 C CN 100403647C
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- ultrasonic motor
- mover
- elastomer
- linear ultrasonic
- stator
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Abstract
The present invention relates to a miniature linear ultrasonic motor, which belongs to the field of a micromotor. The present invention is composed of a stator, a casing and a mover, wherein the stator is spliced with a drive foot (4) on an elastic body (7), and multilayer piezoelectric ceramics (5) are compacted on an elastic body (7) by a wedge plate (6); an elastic body (7) is installed on the casing by a supporting screw (8), and a spring (9) on the supporting screw is used for regulating forepressure; the casing comprises an inner casing (2) and an outer casing (3); when a certain AC voltage within supersonic frequency is applied to piezoelectric ceramics (5), an elastic body (7) generates first longitudinal vibration and second bending vibration to drive a drive foot (4) to have elliptical movement; when a mover (11) is compacted on the drive foot, corresponding pushing force can be generated to push a mover (11) to have rectilinear movement. Except that the present invention has a series of advantages of a common ultrasonic motor, compared with the prior linear ultrasonic motor, the present invention has the advantages of smaller volume, larger thrust output, convenient installation, high reliability, etc.
Description
Technical field:
Small linear ultrasonic motor of the present invention belongs to the ultrasound electric machine in the electrical micro-machine field.
Background technology:
Ultrasound electric machine is to utilize the inverse piezoelectric effect of piezoelectric ceramic and the novel electrical micro-machine of ultrasonic vibration.Linear ultrasonic motor belongs to a kind of of standing wave type ultrasound electric machine.This kind motor except that have compact conformation, operation that ultrasound electric machine has quiet, have bigger thrust/volume ratio, be easy to the advantages such as location and speed regulating control, also have mode simple in structure, that compress by voussoir piezoelectric ceramic is installed, characteristics such as pretightning force is adjustable, easy for installation between fixed, mover.
Summary of the invention
The objective of the invention is to develop that a kind of structure is simpler, volume is littler, efficient is high, thrust is big, easy for installation, the small linear ultrasonic motor that range of application is novel more widely.
For achieving the above object, this small linear ultrasonic motor has carried out Optimal Structure Designing to stator, thereby has further reduced the size of motor, has improved the operating efficiency of motor.Motor is mainly by stator, and housing and mover are formed.Be characterized in: stator is to be pressed on the elastomer by voussoir respectively by two stacked piezoelectric ceramic to constitute, and elastomer is installed on the housing by the supporting screw that two ends are with spring, and the spring on the screw is used to adjust precompression; Drive on the sufficient curved peak that shakes of second order that is bonded on the elastomer with corresponding two of two stacked piezoelectric ceramic, two drive foot and contact with mover; Electric machine casing is divided into inner and outer shell, and shell body wires up inner housing, opens two installing holes respectively in the housing outer.
The present invention compared with prior art has characteristics such as structure is simple more, compact, volume is littler, easier for installation, and range of application is wider, is more suitable in drive unit small-sized, precision optical machinery.
Description of drawings:
Fig. 1 is the stator structure schematic diagram of small linear ultrasonic motor.
Fig. 2 is that small linear ultrasonic motor is formed schematic diagram.
Label title among the above-mentioned figure: 1, installing hole, 2, shell body, 3, inner housing, 4, drive foot, 5, stacked piezoelectric ceramic, 6, voussoir, 7, the stator elastomer, 8, supporting screw, 9, spring, 10, nut, 11, mover
Embodiment:
The present invention is based on the single order longitudinal vibration that utilizes the piezoelectric ceramic piece piezoelectric effect to swash stator and second order bending vibration modes and the novel linear type ultrasound electric machine that is developed into.It mainly is made up of stator, housing and mover.Fig. 1 is a stator structure schematic diagram of the present invention.As seen from the figure, stator is pressed on the elastomer 7 by two voussoirs 6 by stacked piezoelectric ceramic 5.Elastomer 7 is a rectangular plate shape, and the both sides, bottom have the wedge-shaped slot that is used to be pressed into voussoir 6, guarantees to be pressed into self-locking behind the voussoir; Elastomer 7 both sides are that fluting passes supporting screw 8 in the middle of the boss shape, are enclosed within the precompression of adjusting when spring 9 on the supporting screw 8 is used to install between motor-driven foot 4 and the contact-making surface.Two drive the curved peak that shakes of second order that sufficient material selection aluminium oxide ceramics is bonded and fixed at stator.The elastomeric physical dimension of stator is determined through finite element optimum design, can guarantee the single order longitudinal vibration and the curved frequency invariance that shakes of second order of motor stator.Adopt Wedge-type to clamp the precompression that piezoelectric ceramic can provide bigger piezoelectric ceramic, can effectively improve the stress distribution situation of piezoelectric ceramic, make exciting efficiency higher.This motor stator adopts inner and outer shell to fix, and only needs during installation stator is pressed on the mover 11, gets final product by the installing hole on the housing is fixing again, and is easy installation and reliable, as shown in Figure 2.
Stacked piezoelectric ceramic can produce under small voltage than large amplitude, has made full use of the d33 effect of piezoelectric ceramic, compares the d31 effect that linear ultrasonic motor in the past adopts, and piezoelectric effect has improved more than 3 times.When two stacked piezoelectric ceramic pass to sinusoidal ac with 90 degree of phase phasic difference frequently respectively, can effectively inspire the single order longitudinal vibration of stator and second order is curved shakes, the synthetic meeting of these two vibrations drives the elliptic motion that produces on the foot in the same way at two.This elliptic motion just adds the precompression that upper spring 9 is provided, and makes to drive foot and 11 generations of mover frictional force, promotes mover 11 and does rectilinear motion.When this two-phase sinusoidal signal of exchange, it is reverse to drive the elliptic motion that is produced on the foot, promotes mover 11 and does counter motion.
Claims (3)
1. small linear ultrasonic motor, comprise stator, housing and mover, it is characterized in that, described stator comprises two stacked piezoelectric ceramic (5), two voussoirs (6) and an elastomer (7), wherein each stacked piezoelectric ceramic (5) is pressed on the elastomer (7) by a voussoir (6), elastomer (7) is installed on the housing by the supporting screw (8) that two ends are with spring (9), bend on the peak that shakes with the second order that corresponding two the driving foots of two stacked piezoelectric ceramic (5) (4) are bonded on the elastomer (7), two drive foot (4) and contact with mover (11).
2. small linear ultrasonic motor according to claim 1 is characterized in that, elastomer (7) is a rectangular plate shape, and the bottom has and install corresponding two wedge-shaped slots of voussoir (6), and the elastomer both sides have the groove that is used to install supporting screw (8).
3. small linear ultrasonic motor according to claim 1 and 2 is characterized in that, housing comprises shell body (2) and inner housing (3), and shell body (2) is installed on the inner housing (3), and shell body (2) outer, two ends has installing hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100376449A CN100403647C (en) | 2005-01-10 | 2005-01-10 | Small linear ultrasonic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100376449A CN100403647C (en) | 2005-01-10 | 2005-01-10 | Small linear ultrasonic motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1652447A CN1652447A (en) | 2005-08-10 |
| CN100403647C true CN100403647C (en) | 2008-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100376449A Expired - Fee Related CN100403647C (en) | 2005-01-10 | 2005-01-10 | Small linear ultrasonic motor |
Country Status (1)
| Country | Link |
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| CN (1) | CN100403647C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013832A (en) * | 2010-12-24 | 2011-04-13 | 南京航空航天大学 | Ultrasonic linear motor and electric excitation method thereof |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101162875B (en) * | 2007-09-13 | 2010-11-17 | 上海大学 | Slender diameter piston type piezoelectric straight line motor |
| CN101789714A (en) * | 2010-03-16 | 2010-07-28 | 南京航空航天大学 | Linear ultrasonic motor comprising two bent vibrating beams and method thereof for electric excitation |
| CN101976969A (en) * | 2010-10-18 | 2011-02-16 | 南京航空航天大学 | Linear buckling ultrasonic motor and electric excitation mode thereof |
| CN102570620B (en) * | 2011-12-26 | 2013-12-11 | 上海交通大学 | Walking energy collection system |
| CN111085950B (en) * | 2019-12-11 | 2021-07-20 | 江苏大学 | Pre-pressure applying device of floating self-balancing ultrasonic motor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05137359A (en) * | 1991-09-20 | 1993-06-01 | Olympus Optical Co Ltd | Ultrasonic vibrator and ultrasonic driving apparatus |
| JPH11187674A (en) * | 1997-12-24 | 1999-07-09 | Asmo Co Ltd | Ultrasonic motor stator and ultrasonic motor |
| CN1235404A (en) * | 1998-05-07 | 1999-11-17 | 南京航空航天大学 | Linear ultrasonic motor and its driving oscillator |
| EP1096469A2 (en) * | 1999-10-28 | 2001-05-02 | Murata Manufacturing Co., Ltd. | Ultrasonic vibration apparatus |
| CN1306336A (en) * | 2001-02-28 | 2001-08-01 | 清华大学 | Bending-vibration ultrasonic small electric machine based on piezoelectric column and electrode combination exciation method |
-
2005
- 2005-01-10 CN CNB2005100376449A patent/CN100403647C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05137359A (en) * | 1991-09-20 | 1993-06-01 | Olympus Optical Co Ltd | Ultrasonic vibrator and ultrasonic driving apparatus |
| JPH11187674A (en) * | 1997-12-24 | 1999-07-09 | Asmo Co Ltd | Ultrasonic motor stator and ultrasonic motor |
| CN1235404A (en) * | 1998-05-07 | 1999-11-17 | 南京航空航天大学 | Linear ultrasonic motor and its driving oscillator |
| EP1096469A2 (en) * | 1999-10-28 | 2001-05-02 | Murata Manufacturing Co., Ltd. | Ultrasonic vibration apparatus |
| CN1306336A (en) * | 2001-02-28 | 2001-08-01 | 清华大学 | Bending-vibration ultrasonic small electric machine based on piezoelectric column and electrode combination exciation method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013832A (en) * | 2010-12-24 | 2011-04-13 | 南京航空航天大学 | Ultrasonic linear motor and electric excitation method thereof |
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| Publication number | Publication date |
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| CN1652447A (en) | 2005-08-10 |
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Effective date of registration: 20090320 Address after: Southern China two road, Ganyu Economic Development Zone, Jiangsu, Lianyungang Patentee after: Jiangsu TransUSM Co., Ltd. Address before: Yudaojie Nanjing city of Jiangsu Province, No. 29 Patentee before: Nanjing University of Aeronautics and Astronautics |
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| ASS | Succession or assignment of patent right |
Owner name: JIANGSU CHUNSHENG ULTRASONIC ELECTRIC MACHINE CO., Free format text: FORMER OWNER: NANJING AERO-SPACE UNIVERSITY Effective date: 20090320 |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080716 Termination date: 20140110 |